Scalable measuring apparatus and displacement display device, sy

Details Scalable measuring apparatus and displacement display device, sy Scalable measuring apparatus and displacement display device, sy

1993-03-22

1995-10-17

Wirthlin, Alvin

Geometrical instruments

Straight-line light ray type

Rod or target

33293, 33706, G01C 1506

Patent

active

054578906

ABSTRACT:
Scalable measuring apparatus for use by an operator with a laser beam from a laser-level transmitter comprising a vertically disposed grade pole having lower and upper extremities. A laser-level receiver is provided for detecting the laser level beam. A controller is mounted on the grade pole and carries the laser-level receiver. At least a portion of the controller is capable of ascending and descending the grade pole. An indicator is electrically coupled to the laser-level receiver for giving a response perceptible to the operator when the laser beam is detected by the laser-level receiver. The controller has a brake for retaining the controller at a predetermined elevation with respect to the grade pole. The controller is capable of ascending and descending the grade pole which is free of markings.

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